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This unit fits Jeeps 2003 to 2011 with the 42RLE automatic overdrive transmission. This new reduction unit replaces the stock 42RLE tailhousing with a 6 gear planetary reduction box featuring a 2.72 low range. This is a true bolt-in doubler that couples to the stock Jeep transfer case or an existing Atlas transfer case.
The RubiCrawler increases your available gear ratios. This allows you to choose the appropriate gear, depending on the terrain in which you’re wheeling. Proper gear choice will allow you more control of the vehicle. Ultimately, this contributes to a fun, and safe, offroading experience, even in extreme environments.
Ratios with a Stock New Process 231/241 are a 2.72:1 and a 7.40:1
Ratios with a Stock NP Rocktrac are a 2.72:1, 4.0:1 and a 10.88:1